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src/share/vm/gc_implementation/g1/g1_globals.hpp@a248d0be1309
src/share/vm/gc_implementation/g1/g1_globals.hpp
Mon, 19 Aug 2019 10:11:31 +0200
- author
- neugens
- date
- Mon, 19 Aug 2019 10:11:31 +0200
- changeset 9861
- a248d0be1309
- parent 7828
- cbc7c4c9e11c
- child 7994
- 04ff2f6cd0eb
- permissions
- -rw-r--r--
8229401: Fix JFR code cache test failures
8223689: Add JFR Thread Sampling Support
8223690: Add JFR BiasedLock Event Support
8223691: Add JFR G1 Region Type Change Event Support
8223692: Add JFR G1 Heap Summary Event Support
Summary: Backport JFR from JDK11, additional fixes
Reviewed-by: neugens, apetushkov
Contributed-by: denghui.ddh@alibaba-inc.com
1 /*
2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
28 #include "runtime/globals.hpp"
29 //
30 // Defines all globals flags used by the garbage-first compiler.
31 //
33 #define G1_FLAGS(develop, develop_pd, product, product_pd, diagnostic, experimental, notproduct, manageable, product_rw) \
34 \
35 product(uintx, G1ConfidencePercent, 50, \
36 "Confidence level for MMU/pause predictions") \
37 \
38 develop(intx, G1MarkingOverheadPercent, 0, \
39 "Overhead of concurrent marking") \
40 \
41 develop(intx, G1MarkingVerboseLevel, 0, \
42 "Level (0-4) of verboseness of the marking code") \
43 \
44 develop(bool, G1PrintReachableAtInitialMark, false, \
45 "Reachable object dump at the initial mark pause") \
46 \
47 develop(bool, G1VerifyDuringGCPrintReachable, false, \
48 "If conc mark verification fails, dump reachable objects") \
49 \
50 develop(ccstr, G1PrintReachableBaseFile, NULL, \
51 "The base file name for the reachable object dumps") \
52 \
53 develop(bool, G1TraceMarkStackOverflow, false, \
54 "If true, extra debugging code for CM restart for ovflw.") \
55 \
56 develop(bool, G1TraceHeapRegionRememberedSet, false, \
57 "Enables heap region remembered set debug logs") \
58 \
59 diagnostic(bool, G1SummarizeConcMark, false, \
60 "Summarize concurrent mark info") \
61 \
62 diagnostic(bool, G1SummarizeRSetStats, false, \
63 "Summarize remembered set processing info") \
64 \
65 diagnostic(intx, G1SummarizeRSetStatsPeriod, 0, \
66 "The period (in number of GCs) at which we will generate " \
67 "update buffer processing info " \
68 "(0 means do not periodically generate this info); " \
69 "it also requires -XX:+G1SummarizeRSetStats") \
70 \
71 diagnostic(bool, G1TraceConcRefinement, false, \
72 "Trace G1 concurrent refinement") \
73 \
74 experimental(bool, G1TraceStringSymbolTableScrubbing, false, \
75 "Trace information string and symbol table scrubbing.") \
76 \
77 product(double, G1ConcMarkStepDurationMillis, 10.0, \
78 "Target duration of individual concurrent marking steps " \
79 "in milliseconds.") \
80 \
81 product(intx, G1RefProcDrainInterval, 10, \
82 "The number of discovered reference objects to process before " \
83 "draining concurrent marking work queues.") \
84 \
85 experimental(bool, G1UseConcMarkReferenceProcessing, true, \
86 "If true, enable reference discovery during concurrent " \
87 "marking and reference processing at the end of remark.") \
88 \
89 product(intx, G1SATBBufferSize, 1*K, \
90 "Number of entries in an SATB log buffer.") \
91 \
92 develop(intx, G1SATBProcessCompletedThreshold, 20, \
93 "Number of completed buffers that triggers log processing.") \
94 \
95 product(uintx, G1SATBBufferEnqueueingThresholdPercent, 60, \
96 "Before enqueueing them, each mutator thread tries to do some " \
97 "filtering on the SATB buffers it generates. If post-filtering " \
98 "the percentage of retained entries is over this threshold " \
99 "the buffer will be enqueued for processing. A value of 0 " \
100 "specifies that mutator threads should not do such filtering.") \
101 \
102 develop(bool, G1SATBPrintStubs, false, \
103 "If true, print generated stubs for the SATB barrier") \
104 \
105 experimental(intx, G1ExpandByPercentOfAvailable, 20, \
106 "When expanding, % of uncommitted space to claim.") \
107 \
108 develop(bool, G1RSBarrierRegionFilter, true, \
109 "If true, generate region filtering code in RS barrier") \
110 \
111 develop(bool, G1RSLogCheckCardTable, false, \
112 "If true, verify that no dirty cards remain after RS log " \
113 "processing.") \
114 \
115 diagnostic(bool, G1PrintRegionLivenessInfo, false, \
116 "Prints the liveness information for all regions in the heap " \
117 "at the end of a marking cycle.") \
118 \
119 product(intx, G1UpdateBufferSize, 256, \
120 "Size of an update buffer") \
121 \
122 product(intx, G1ConcRefinementYellowZone, 0, \
123 "Number of enqueued update buffers that will " \
124 "trigger concurrent processing. Will be selected ergonomically " \
125 "by default.") \
126 \
127 product(intx, G1ConcRefinementRedZone, 0, \
128 "Maximum number of enqueued update buffers before mutator " \
129 "threads start processing new ones instead of enqueueing them. " \
130 "Will be selected ergonomically by default. Zero will disable " \
131 "concurrent processing.") \
132 \
133 product(intx, G1ConcRefinementGreenZone, 0, \
134 "The number of update buffers that are left in the queue by the " \
135 "concurrent processing threads. Will be selected ergonomically " \
136 "by default.") \
137 \
138 product(intx, G1ConcRefinementServiceIntervalMillis, 300, \
139 "The last concurrent refinement thread wakes up every " \
140 "specified number of milliseconds to do miscellaneous work.") \
141 \
142 product(intx, G1ConcRefinementThresholdStep, 0, \
143 "Each time the rset update queue increases by this amount " \
144 "activate the next refinement thread if available. " \
145 "Will be selected ergonomically by default.") \
146 \
147 product(intx, G1RSetUpdatingPauseTimePercent, 10, \
148 "A target percentage of time that is allowed to be spend on " \
149 "process RS update buffers during the collection pause.") \
150 \
151 product(bool, G1UseAdaptiveConcRefinement, true, \
152 "Select green, yellow and red zones adaptively to meet the " \
153 "the pause requirements.") \
154 \
155 product(uintx, G1ConcRSLogCacheSize, 10, \
156 "Log base 2 of the length of conc RS hot-card cache.") \
157 \
158 product(uintx, G1ConcRSHotCardLimit, 4, \
159 "The threshold that defines (>=) a hot card.") \
160 \
161 develop(intx, G1RSetRegionEntriesBase, 256, \
162 "Max number of regions in a fine-grain table per MB.") \
163 \
164 product(intx, G1RSetRegionEntries, 0, \
165 "Max number of regions for which we keep bitmaps." \
166 "Will be set ergonomically by default") \
167 \
168 develop(intx, G1RSetSparseRegionEntriesBase, 4, \
169 "Max number of entries per region in a sparse table " \
170 "per MB.") \
171 \
172 product(intx, G1RSetSparseRegionEntries, 0, \
173 "Max number of entries per region in a sparse table." \
174 "Will be set ergonomically by default.") \
175 \
176 develop(bool, G1RecordHRRSOops, false, \
177 "When true, record recent calls to rem set operations.") \
178 \
179 develop(bool, G1RecordHRRSEvents, false, \
180 "When true, record recent calls to rem set operations.") \
181 \
182 develop(intx, G1MaxVerifyFailures, -1, \
183 "The maximum number of verification failrues to print. " \
184 "-1 means print all.") \
185 \
186 develop(bool, G1ScrubRemSets, true, \
187 "When true, do RS scrubbing after cleanup.") \
188 \
189 develop(bool, G1RSScrubVerbose, false, \
190 "When true, do RS scrubbing with verbose output.") \
191 \
192 develop(bool, G1YoungSurvRateVerbose, false, \
193 "print out the survival rate of young regions according to age.") \
194 \
195 develop(intx, G1YoungSurvRateNumRegionsSummary, 0, \
196 "the number of regions for which we'll print a surv rate " \
197 "summary.") \
198 \
199 product(uintx, G1ReservePercent, 10, \
200 "It determines the minimum reserve we should have in the heap " \
201 "to minimize the probability of promotion failure.") \
202 \
203 diagnostic(bool, G1PrintHeapRegions, false, \
204 "If set G1 will print information on which regions are being " \
205 "allocated and which are reclaimed.") \
206 \
207 develop(bool, G1HRRSUseSparseTable, true, \
208 "When true, use sparse table to save space.") \
209 \
210 develop(bool, G1HRRSFlushLogBuffersOnVerify, false, \
211 "Forces flushing of log buffers before verification.") \
212 \
213 develop(bool, G1FailOnFPError, false, \
214 "When set, G1 will fail when it encounters an FP 'error', " \
215 "so as to allow debugging") \
216 \
217 product(uintx, G1HeapRegionSize, 0, \
218 "Size of the G1 regions.") \
219 \
220 product(uintx, G1ConcRefinementThreads, 0, \
221 "If non-0 is the number of parallel rem set update threads, " \
222 "otherwise the value is determined ergonomically.") \
223 \
224 develop(bool, G1VerifyCTCleanup, false, \
225 "Verify card table cleanup.") \
226 \
227 product(uintx, G1RSetScanBlockSize, 64, \
228 "Size of a work unit of cards claimed by a worker thread" \
229 "during RSet scanning.") \
230 \
231 develop(uintx, G1SecondaryFreeListAppendLength, 5, \
232 "The number of regions we will add to the secondary free list " \
233 "at every append operation") \
234 \
235 develop(bool, G1ConcRegionFreeingVerbose, false, \
236 "Enables verboseness during concurrent region freeing") \
237 \
238 develop(bool, G1StressConcRegionFreeing, false, \
239 "It stresses the concurrent region freeing operation") \
240 \
241 develop(uintx, G1StressConcRegionFreeingDelayMillis, 0, \
242 "Artificial delay during concurrent region freeing") \
243 \
244 develop(uintx, G1DummyRegionsPerGC, 0, \
245 "The number of dummy regions G1 will allocate at the end of " \
246 "each evacuation pause in order to artificially fill up the " \
247 "heap and stress the marking implementation.") \
248 \
249 develop(bool, G1ExitOnExpansionFailure, false, \
250 "Raise a fatal VM exit out of memory failure in the event " \
251 " that heap expansion fails due to running out of swap.") \
252 \
253 develop(uintx, G1ConcMarkForceOverflow, 0, \
254 "The number of times we'll force an overflow during " \
255 "concurrent marking") \
256 \
257 experimental(uintx, G1NewSizePercent, 5, \
258 "Percentage (0-100) of the heap size to use as default " \
259 "minimum young gen size.") \
260 \
261 experimental(uintx, G1MaxNewSizePercent, 60, \
262 "Percentage (0-100) of the heap size to use as default " \
263 " maximum young gen size.") \
264 \
265 experimental(uintx, G1MixedGCLiveThresholdPercent, 85, \
266 "Threshold for regions to be considered for inclusion in the " \
267 "collection set of mixed GCs. " \
268 "Regions with live bytes exceeding this will not be collected.") \
269 \
270 product(uintx, G1HeapWastePercent, 5, \
271 "Amount of space, expressed as a percentage of the heap size, " \
272 "that G1 is willing not to collect to avoid expensive GCs.") \
273 \
274 product(uintx, G1MixedGCCountTarget, 8, \
275 "The target number of mixed GCs after a marking cycle.") \
276 \
277 experimental(bool, G1EagerReclaimHumongousObjects, true, \
278 "Try to reclaim dead large objects at every young GC.") \
279 \
280 experimental(bool, G1EagerReclaimHumongousObjectsWithStaleRefs, true, \
281 "Try to reclaim dead large objects that have a few stale " \
282 "references at every young GC.") \
283 \
284 experimental(bool, G1TraceEagerReclaimHumongousObjects, false, \
285 "Print some information about large object liveness " \
286 "at every young GC.") \
287 \
288 experimental(uintx, G1OldCSetRegionThresholdPercent, 10, \
289 "An upper bound for the number of old CSet regions expressed " \
290 "as a percentage of the heap size.") \
291 \
292 experimental(ccstr, G1LogLevel, NULL, \
293 "Log level for G1 logging: fine, finer, finest") \
294 \
295 notproduct(bool, G1EvacuationFailureALot, false, \
296 "Force use of evacuation failure handling during certain " \
297 "evacuation pauses") \
298 \
299 develop(uintx, G1EvacuationFailureALotCount, 1000, \
300 "Number of successful evacuations between evacuation failures " \
301 "occurring at object copying") \
302 \
303 develop(uintx, G1EvacuationFailureALotInterval, 5, \
304 "Total collections between forced triggering of evacuation " \
305 "failures") \
306 \
307 develop(bool, G1EvacuationFailureALotDuringConcMark, true, \
308 "Force use of evacuation failure handling during evacuation " \
309 "pauses when marking is in progress") \
310 \
311 develop(bool, G1EvacuationFailureALotDuringInitialMark, true, \
312 "Force use of evacuation failure handling during initial mark " \
313 "evacuation pauses") \
314 \
315 develop(bool, G1EvacuationFailureALotDuringYoungGC, true, \
316 "Force use of evacuation failure handling during young " \
317 "evacuation pauses") \
318 \
319 develop(bool, G1EvacuationFailureALotDuringMixedGC, true, \
320 "Force use of evacuation failure handling during mixed " \
321 "evacuation pauses") \
322 \
323 diagnostic(bool, G1VerifyRSetsDuringFullGC, false, \
324 "If true, perform verification of each heap region's " \
325 "remembered set when verifying the heap during a full GC.") \
326 \
327 diagnostic(bool, G1VerifyHeapRegionCodeRoots, false, \
328 "Verify the code root lists attached to each heap region.") \
329 \
330 develop(bool, G1VerifyBitmaps, false, \
331 "Verifies the consistency of the marking bitmaps")
333 G1_FLAGS(DECLARE_DEVELOPER_FLAG, DECLARE_PD_DEVELOPER_FLAG, DECLARE_PRODUCT_FLAG, DECLARE_PD_PRODUCT_FLAG, DECLARE_DIAGNOSTIC_FLAG, DECLARE_EXPERIMENTAL_FLAG, DECLARE_NOTPRODUCT_FLAG, DECLARE_MANAGEABLE_FLAG, DECLARE_PRODUCT_RW_FLAG)
335 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1_GLOBALS_HPP
